feat: 添加 Laravel Reverb 支持，更新 .env.example 文件以配置 WebSocket，增强彩票调度功能，更新 API 路由以支持期号管理与结果发布

app/Models/DrawResultItem.php

@@ -0,0 +1,43 @@
+<?php
+
+namespace App\Models;
+
+use Illuminate\Database\Eloquent\Model;
+use Illuminate\Database\Eloquent\Relations\BelongsTo;
+
+/** 单条中奖号码行（与界面文档奖项分区对应） {@see draw_result_items} */
+class DrawResultItem extends Model
+{
+    public const UPDATED_AT = null;
+
+    protected $fillable = [
+        'draw_id',
+        'result_batch_id',
+        'prize_type',
+        'prize_index',
+        'number_4d',
+        'suffix_3d',
+        'suffix_2d',
+        'head_digit',
+        'tail_digit',
+    ];
+
+    protected function casts(): array
+    {
+        return [
+            'prize_index' => 'integer',
+            'head_digit' => 'integer',
+            'tail_digit' => 'integer',
+        ];
+    }
+
+    public function draw(): BelongsTo
+    {
+        return $this->belongsTo(Draw::class);
+    }
+
+    public function batch(): BelongsTo
+    {
+        return $this->belongsTo(DrawResultBatch::class, 'result_batch_id');
+    }
+}